##// END OF EJS Templates
upstream » mercurial-mirror
RSS

Clone from https://www.mercurial-scm.org/repo/hg-all

internals: minor rewriting of revlogs documentation...
Gregory Szorc -
r41235:d8fe67db default
parent child Browse files
Show More
Show file before | Show file after | Hide comments
@@ -11,8 +11,8 b' Metadata includes the hash of the revisi'
11 links to its *parent* entries. The collective metadata is referred
11 links to its *parent* entries. The collective metadata is referred
12 to as the *index* and the revision data is the *data*.
12 to as the *index* and the revision data is the *data*.
13
13
14 Revision data is stored as a series of compressed deltas against previous
14 Revision data is stored as a series of compressed deltas against
15 revisions.
15 ancestor revisions.
16
16
17 Revlogs are written in an append-only fashion. We never need to rewrite
17 Revlogs are written in an append-only fashion. We never need to rewrite
18 a file to insert nor do we need to remove data. Rolling back in-progress
18 a file to insert nor do we need to remove data. Rolling back in-progress
@@ -35,9 +35,6 b' This integer is logically divided into 2'
35 significant half of the integer is the format/version short. The other
35 significant half of the integer is the format/version short. The other
36 short holds feature flags that dictate behavior of the revlog.
36 short holds feature flags that dictate behavior of the revlog.
37
37
38 Only 1 bit of the format/version short is currently used. Remaining
39 bits are reserved for future use.
40
41 The following values for the format/version short are defined:
38 The following values for the format/version short are defined:
42
39
43 0
40 0
@@ -53,15 +50,24 b' 57005 (0xdead)'
53 beyond 32-bit header.
50 beyond 32-bit header.
54
51
55 The feature flags short consists of bit flags. Where 0 is the least
52 The feature flags short consists of bit flags. Where 0 is the least
56 significant bit, the following bit offsets define flags:
53 significant bit. The bit flags vary by revlog version.
54
55 Version 0 revlogs have no defined flags and the presence of a flag
56 is considered an error.
57
58 Version 1 revlogs have the following flags at the specified bit offsets:
57
59
58 0
60 0
59 Store revision data inline.
61 Store revision data inline.
60 1
62 1
61 Generaldelta encoding.
63 Generaldelta encoding.
62
64
63 2-15
65 Version 2 revlogs have the following flags at the specified bit offsets:
64 Reserved for future use.
66
67 0
68 Store revision data inline.
69 1
70 Generaldelta encoding.
65
71
66 The following header values are common:
72 The following header values are common:
67
73
General Comments 0
You need to be logged in to leave comments. Login now